[Serusers] Retransmission problem

[Zappasodi Daniele]

Hello, 
I have a big problem with the retransmissions.
In my tests sometimes the retransmission handler doesn't seem to work properly and it resends the INVITE after receiving a final response. 
Moreover it doesn't respect the time-out (instead wait 1 second it resends the packet after few decimal), but this is a minor item.

An example:
INVITE sip:31203
From 32201

	UA1(32201)  ---> SER ---> UA2(31203)	
INVITE 	UA1 ---> SER ---> UA2	
Trying	UA1 <--- SER
183		UA1 <--- SER <--- UA2
480		UA1 <--- SER <--- UA2
ACK	 	UA1 ---> SER ---> UA2	
...
Other call.

After 0,5 msec SER sends again the first INVITE to UA2:
INVITE 		SER ---> UA2	
183			SER <--- UA2
etc.

In the attached zipped file there are the syslog, the ser config file (only the relevant parts) and the ethereal captures related to this example.


Some additional information:
SER version is 0.9.2, compiled for arm.
In my scenario SER and UA2 are on the same box.
In LAN_capture.cap file there is the message flow between UA1 and SER, in lo_capture.cap between SER and UA2. 

Can someone explain me this behaviour?
Maybe something wrong in my config file? Note that I use t_lookup_request, t_newtran, t_forward_nonack_uri in order to recognize retransmitted INVITE, could it be here the problem?

thanks
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